More nightime digiscoping! It was about 16:20 and the bird was over 500m away.
Will found a first-winter Glaucous Gull at Tanholt GP earlier in the day and with an Iceland Gull reported from Dogsthorpe Tip the day before I thought it was worth giving the roost a try at CEGB. There was no sign of an Iceland but the Glaucous was one of the last birds to arrive and there were also at least an adult and a first-winter Yellow-legged Gulls.
Another first-winter Glaucous roosted at Grafham Water this evening but the Tanholt bird is more likly to have roosted here.
Glaucous Gull Larus hyperboreus
Digiscoped with Canon Powershot A640 and Leica APO77 x20